Minerals Alert July 2004

  1. Internet service - The Australian Mineral Occurrences Portal
  2. Index of Airborne Geophysical Surveys
  3. AusGeo News 74 - June 2004 - a minerals thematic issue
  4. Metallogenic Potential of Australian Proterozoic Granites report on the Internet
  5. Gawler Craton State of Play 2004 and Seismic Workshop, Adelaide 4-6 August
  6. About "Minerals Alert"

1. Internet service - The Australian Mineral Occurrences Portal

The Australian Mineral Occurrences Portal contains a national overview of Australian mineral occurrences. You can zoom, pan, search and display a national overview of mineral occurrence information with geology, infrastructure and topography and image backdrops such as gravity, magnetics, LANDSAT and seamless 1:250 000 topography. It also has spatial and non-spatial search tools which provide a key set of nationally agreed attributes including: Name of Occurrence, Commodities, Class (ie occurrence, deposit or mine), Location (longitude, latitude), Accuracy in metres and Source. The mineral occurrence data available at this portal has been compiled from relevant State/Territory Geological Survey databases and aims to provide a national overview of mineral occurrences. It does not attempt to duplicate the complete set of attributes held by each State/Territory Survey.

For more information contact Neal Evans by phone on +61 (0)2 6249 9698 or by email at Neal.Evans@ga.gov.au

2. Index of Airborne Geophysical Surveys

The Eighth Edition of the Index of Australian Government Airborne Geophysical Surveys is now available in both hardcopy and digital formats. This edition contains a more comprehensive coverage of surveys than the previous edition released in May 2003. Information on surveys prior to 2003 has been updated and additional surveys have been included from various State and Federal exploration initiatives and the ongoing airborne survey work of Government bodies. Specifications of several open file surveys are also included in this release. The Index contains a summary of the major specifications of over 900 airborne surveys.

An updated interactive database of metadata for Australian airborne geophysical surveys has also been released, along with updated colour index maps which show the coverage over Australia of Geoscience Australia and State Government airborne magnetic, radiometric and gravity surveys. Geoscience Australia is custodian of the most comprehensive publicly available Australian airborne magnetic, gamma-ray, elevation model and electromagnetic databases and gravity database. The airborne geophysics database contains more than 18.1 million line kilometres of mainly total magnetic intensity and gamma-ray spectrometric data.

Digital versions of the Index Record, Index Maps and data files can be downloaded free. Visit the Geophysical Data Releases web page for news about this and other recent data releases.

For more information contact Murray Richardson by phone on +61 (0)2 6249 9229 or by email at Murray.Richardson@ga.gov.au

3. AusGeo News 74 - June 2004 - a minerals thematic issue

The June 2004 edition of Geoscience Australia's AusGeo News is now available on the Internet. This edition has a minerals theme and includes items on Gawler Craton copper and gold, geophysical inversion in regions of thick cover and chemical reasons for lode-gold associations among a range of topical reports relevant to the minerals sector.

For more information see AusGeo News 74.

4. Metallogenic Potential of Australian Proterozoic Granites report on the Internet

Geoscience Australia Record 2001/12, which presents the results of 'The Metallogeny of Australian Proterozoic Granites' project, undertaken in collaboration with 20 minerals exploration companies in 1996-1997, has only been available in hard copy. It is now available on the internet.

The project examined the potential relationships between Proterozoic granites and mineralisation. Data was compiled on the mineralogy, geochemistry and age of Proterozoic granites and felsic volcanics and the age and mineralogical composition of sediments within 5 kms of Proterozoic granite boundaries for 20 provinces. The project investigated only spatial associations.

The Record contains: Section One: a synthesis on granites and copper-gold metallogenesis in the Australian Proterozoic with the results are synthesised on the basis of the nine broad associations found Australia-wide; Sections 2 to 16 contain the results of the project from each Proterozoic granite province of Australia. These are summaries of the Full province reports on the individual granite suites/supersuites and their hosts in all Proterozoic provinces of Australia. Section 17 provides the original Project proposal and Section 18 fully describes project methodology. Several abstracts and papers which have been published on the findings of this work are included in Sections 19 to 24. The original GIS, which contains maps of each province with most of the data attached as attributes to the individual granite and sediment polygons, is also available for downloading.

For more information contact Lesley Wyborn by phone on +61 (0)2 6249 9489 or by email at Lesley.Wyborn@ga.gov.au

5. Gawler Craton State of Play 2004 and Seismic Workshop, Adelaide 4-6 August

Geoscience Australia and Primary Industries and Resources South Australia are holding Gawler Craton: State of Play 2004 conference and Seismic Workshop at the AMF Centre in Adelaide on 4-6 August. Highlights will include a core display and release of new data and concepts for mineral explorers in the Olympic Cu-Au province, Harris Greenstone Belt, Central Gawler Gold province, Mulgathing Complex and western Gawler Craton. Other themes are Mineral Sands, Diamonds, and New Frontiers. The Seismic Workshop on 6 August will see the public release of last year's seismic survey of the Olympic Cu-Au province. The seismic images show the structure and depth of Neoproterozoic basins, and shallow to deep crustal architecture of basement in the Olympic Dam region. Speakers from industry, PIRSA, Geoscience Australia, CRCLEME and universities will give you the latest information on Gawler Craton mineralisation, exploration under cover, and tectonics that controlled mineralisation.

Details, updates, and registration forms are available at www.minerals.pir.sa.gov.au.

For more information contact Roger Skirrow on +61 (0)2 6249 9442 or by email at Roger.Skirrow@ga.gov.au

6. About "Minerals Alert"

For more information contact Mike Huleatt on +61 2 6249 9087 or email mike.huleatt@ga.gov.au.

To view past editions of Geoscience Australia's Minerals Alert, visit the Minerals Alert Newsletter Archive.

Topic contact: media@ga.gov.au Last updated: October 4, 2013